Carbureter.



CARITHERS.

CARBURETER.

APPucATloN FILED APRA. ma.

Patented Apr. 11, 1916.

3 SHEETS-SHEET L Stimm,

1. H. f RITHERS.

CAKBURETER.

Avmcmou men Ams, 1915.

Patented Apr. 11, 1916.

3 SHEETS-SHEET 2.

UN I TED STATES PATENT OFFICE.

JAMES H. CARITHERS` OF DANVILLE, ILLINOIS.

CARBURETER.

Application led April 9, 1915.

ie it known that l. .lanes ll. (Hartman, a eitizen of the United State residing at Danville. in the eountv of Vermilion and State of illiuoiat. have invented new and useful linprtiveuientI in tfarbureterf. of whieh the following is a Speeilieatiou.

This invention relateay to earl'iureterS. the broad object. iu view being to produce a earbureter which. without any change or alteration therein after leaving the fai-tory,

mav be utilized for vaporizing liquid fuels or fuel oilS of relativelyY higher and lower u ioeifio gravit)7 and volatility. the change from one fuel oil to the other being etleeted instantly by merely shifting a single valve,

In the use of fuel oils of low speoitie gravity` it has been found necessary to run a motor or engine until it is heated sutlieientlv to volatilize a heavier grade of oil in order that said oil may be thoroughly vaporized hefore reaching the engine. The. carburetor of thie invention is designed to primarilyY latart the engine. with oil of a coinparativelv high test and after the engine beeomes sutlieientlv heated, to operate Said engine with a fuel oil of lower Speeitie gravity.

\\'ith the above and other obieets in view,y the invention eousists in the novel consti-uw tion. Combination and arrangement of pa rte, aS herein deseribed. illustrated and elain'ied.

In the aeeonipanving drawinge:#Figare l i5 a top plan view of the earbureter. ineluding the means for conducting the air thereto and heating the air which is used in connection with one of the carl/)ureting chambers. Fig. 2 is a rs' le elevation of the Same. Fig. is a vertical longitudinal iseetion through the (farhureter. Fig. 4 is a ver tical cross section through the saine. Fig. 5 i5 a. fragn'ientarv Seetion showingtheineans for varying the area of the notch or opening in the throttle valve when the latter is closed. Fig. G is an end elevation of the air heating device.. showing the exhaut pipe of an engine in Cross section.

The nuiin body of the earbureter Comprises an upper chamber-like section l. a bottoni Set-.tion Q. and an intermediate nozzle plate 3 which divides thel upper and lower sections from eaeh other and also divides the interior of the rarhureter into a bottom fuel section and a superimposed earbureting section.

VJithin the bottom section i5 a vertical Specification of Letters Patent.

Patented Apr. 11, 1916.

semi No. 20.277,

partition wall whirh -zlivides the bottom xaeetion into a gafolene eliarnber or reaervoir 5 and a lwrowne rhaniber or 4reservoir 6. A like eentral vertical partitioi. wall 7 dividr the upper mfrtion of the flarbnreter into a gasoline earburrting ebainber't and a kerosene rarbureting ehaniber il. it this point it inav be :dated that'r the terni gasolene herein timed imputa,l a liquid fuel of a relativelv high epeeilie. gravit)v anol vola,- tihtvnllile the teint kerosene is need to iinplv a liquid fuel of relatively lower spl eilie gravity and volatility. the ternir; refer-red to heilig ual-d .einipl'v for the salie oli convenience in dest-,ribingr the. carinii-eter.

The nozzle plate il whieh ie shown in plan view in Fig. l comprises a pair ot' upstandinoy float receiving poelwta` lll in each of whieh i5 arranged a lloat li au best illnetrated in Fig. t. said float beingr adapted t0 risel and fall in aeeortlanre with the level of liquid therein. *lath loat llV is preferably of hollow inetal eoiiatruetien aud provided with a tube ti extending verticali)v therethrough and iutewnallvv threaded to be engaged o v the threads 135 of a vertieally extendirn,y stent lll provided at it4 upper end with an operating eap or head l5. The stem il extends eutirelv through the float. 1l and has a ball and Ameldt o. Swivel joint at 1G with a lever i7 pivotallv mounted at 18 within the fuel ehainber and connected at 19 to a needle valve 2() forming one of the fuel inlet valvee. it being understood that there is a fuel inlet valve for each grade of fuel used.

l designates nipples to which the fuel feed pipes lead.

it will now be seen that hv revolving the stein 1l by nieang of the milled head 15, the flot.; 11 may be raised and lowered according to the aniount of fuel necessary to be maintained in the fuel Chan'iber. rl`he construction referred to is dnplieated in each of the fuel eliamhers. The stents l2 extend through openings Q2 in thetop section l to the. earburett-r where they are easily aeeessible for effecting the adjustment referred to.

The nozzle plate is also provided with a pluralit \y of depressione or basine lil and lujfiefeiem-e to Fig. 4 it will be observed that two ol' sueh depresaiona` or basins are formed at eat-h side of the partition 4. ln eaeh of Said depressione there is arranged a nozzle '24 so that there are two nozzleS till *al-ong its marginal edges at in communication with each fuel chamber and arranged to discharge into the superimposed earbureting chamber. By prefer4 ence, the nozzles on the kerosene side of the carbureter are provided with heating flanges 25 to assist in Vaporizing the kerosene. The flanges 25 absorb some of the heat from the incoming current of the hot air from the jacket 39 and raise the temperature of the fuel passing through the nozzles 34. Drain 'tubes 26 lead from each of the de pressions 23 through the bottom section of the carbureter 6 so as to provide for carrying off excess fuel oil in case either can bureting chamber becomes flooded. Each of the fuel chambers is also provided with a drain cock 27.

In order to assemble the members l, l and 3 of the carbureter, each of said members is flanged where they meet and are secured together by fasteners 2S which may consist either of bolts or screws.

Air is admitted to the carbureter by means of pipes or conduits 29 and 30, the pipe 29 furnishing air for the kerosene side of the carbureter and the pipe 30 furnishing air for the gasolene side thereof. their ends adjacent to the carburetor body. said pipes are ianged as shown at 3l and fastened to a duplex coupling or manifold 32 which is also flanged as shown at 33 and secured by fasteners 3l to the carbureter body. The coupling 32 is preferably rectangular in crosssection and the adjacent. abutting ends of the pipes v29' and 30 are therefore correspondingly squared. l? or the remainder of their length the pipes 2) and 30 are preferably round in cross tion. The pipe 29 which furnishes air for the kerosene side of the carburetor is connected at one end to the dischargelnozzle 35 of an air heating device associated with the exhaust pipe 36 of an engine. This part of the apparatus comprises one or bands 37 of heat retaining material which extends around the exhaust pipe ask shown in Fig. 6 and forms a heat absorbing strap. the same being split so that it may be placed around the exhaust pipe and being held in place by means of a. clamping screw 38. A sheet metal casing or jacket 39 is fastened Ll0 to the heat absorbing strap 37. said casing being sul stantially of inverted U-shape and having one or more openings in the top thereof controlled by manually controlled cold air ad'- mission dampers 4l which may be opened to any desired extent to regulate the amount of cold air to be admitted into the easing 29 in accordance with the atmospheric tern-I it being necessary sometimes in perature,

summer weather to admit air at the point or points referred to in order to avoid overheating the engine. Attached to each of the heat absorbing straps 37 is a substantially conibustion engine.

U-shaped heat conducting strip 42-the same being fastened at #f3 to the strap 37. "he strip l2 may be of any desired shape so as to conduct its heat to the air-.drawn into the casing ll`hus the air supply to the kerosene side of the carbureter is heated by the intake pipe before reaching the carbureter body. y

The coupling air inlet valves 44, one for each of the pipes 29 and 30.` the coupling 32 being centrally divided by a partition 45 into two compartments communicating respectively with the two carbureting chambers of the carburetor. Each of the 'valves 4l is pivotally mounted at etti within its respective` compartment. the pivot -lb being located above the center of the valve and extending horizontally, whereby the valve 44 is rendered self -closing by gravity but is adapted to be opened by air pressure to the dotted line position shown in Fig. l. Thus each valve 44 is opened and closed automatically in accordance with which side of the carbureter is beingv used.

At'the discharge end of the carbureter there is arranged an outlet neck 4:7 flanged .as shown at 48 to enable the saine to be bolted. screwed or otherwise fastened. to the intake pipe or manifold of an internal Vithin the neck-47 is mounted a butterfly throttle valve 4S) the stem 5() of whichis provided with an opcrating lever 51. and also provided with a stop ment of said throttle Valve. The body of the valve 49 is formed with a notch 53 preferably V-shaped so that when the valve 49 is in its closed position. there will be an opening of sufficient area to admit carburet'ed air to the engine snlticiently to keep the same running at. a low rate of speed. rlhe size. or arca of the notch 5? is variable by means of an adjustable plug 54 tapered as shown to conform to the shape of `the notch 53, said 'plug 54 through an opening Ain the nec-k 47 and provided with'neans for turning'saidplum said means shown as consisting of a screw driver nick 55 and a lock nut 5G, all` as shown in Fig. 5; lf-

Bet-Ween the throttle valve Ll) and the interior of themain body ofthe carburetor there are two oppositely located quadrant shaped ports 57 adjacent towhieh there is pirotally mounted on a vertical axisi an. anglo valve 5S consisting of two wings arranged substantially at right angles to each other as shown in Fig. 3. 'lhevalve 58 is mounted fast on a vertical stein 'ex'tending through the top of the upper section of the carbureter where it is provided with an operating. hand-le G0. By turning the'valve in one direction, the flow of the mixture through one of the ports 57 is cut off and ad- 32l Vcontains a plurality otx` 52 adapted to limit thel closing more# being threaded' l Y 7% 523' il bunny-2 m han muh'. mw

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